I am left handed and use a trophy ridge sight. I dont have to turn mine upside down either. Good sight.
Trophy ridge hit man hay I have lets you take the level off swap the scope and put the level in the bottom to make it left handed.
I'm a lefty and just use the Tru Glow sights. I use the 3 pin and swap the Red and Green pins so that my Green is on top. I've used others upside down as well. I didn't know anyone made a left handed sight.